slimtoolkit/slim · error

cannot encode stop command: %w

Error message

cannot encode stop command: %w

What it means

ExecuteStopTargetAppCommand encodes a command.StopMonitor{} message before appending it to the commands FIFO. This error wraps a failure of command.Encode, meaning the stop command could not be serialized.

Source

Thrown at pkg/app/sensor/standalone/control/stop.go:14

package control

import (
	"context"
	"fmt"

	"github.com/slimtoolkit/slim/pkg/ipc/command"
	"github.com/slimtoolkit/slim/pkg/util/fsutil"
)

func ExecuteStopTargetAppCommand(ctx context.Context, commandsFile string) error {
	msg, err := command.Encode(&command.StopMonitor{})
	if err != nil {
		return fmt.Errorf("cannot encode stop command: %w", err)
	}

	if err := fsutil.AppendToFile(getFIFOPath(commandsFile), msg, false); err != nil {
		return fmt.Errorf("cannot append stop command to FIFO file: %w", err)
	}

	return nil
}

View on GitHub (pinned to 81940d17fa)

Solutions

1. Inspect the wrapped error from command.Encode for the concrete serialization failure.
2. Ensure the client code and the slim sensor binary use matching versions of the command package/schema.
3. Rebuild both sides from the same source revision.

if err := control.ExecuteStopTargetAppCommand(ctx, commandsFile); err != nil {
    if strings.Contains(err.Error(), "cannot encode stop command") {
        log.Errorf("stop command encoding failed; check client/sensor version match: %v", err)
    }
    return err
}

When it happens

Trigger: command.Encode failing for &command.StopMonitor{} — e.g. the encoder returns an error due to an unsupported/changed message format or an internal serialization failure.

Common situations: Version mismatch between the sensor binary and the code issuing the stop command (message schema changed); corrupted or incompatible command package.

Related errors

• start monitor timeout
• cannot append stop command to FIFO file: %w

AI-assisted analysis of slimtoolkit/slim@81940d17fa (2026-08-31). Data as JSON: /api/errors/a25f61dfc38cdef5. Report an issue: GitHub.